Support biCompression I420
[libav.git] / libavdevice / vfwcap.c
CommitLineData
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1/*
2 * VFW capture interface
3 * Copyright (c) 2006-2008 Ramiro Polla.
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include "avformat.h"
23#include <vfw.h>
24#include <windows.h>
25
26//#define DEBUG_VFW
27
28/* Defines for VFW missing from MinGW.
29 * Remove this when MinGW incorporates them. */
30#define WM_CAP_START (0x0400)
31#define WM_CAP_SET_CALLBACK_VIDEOSTREAM (WM_CAP_START + 6)
32#define WM_CAP_DRIVER_CONNECT (WM_CAP_START + 10)
33#define WM_CAP_DRIVER_DISCONNECT (WM_CAP_START + 11)
34#define WM_CAP_GET_VIDEOFORMAT (WM_CAP_START + 44)
35#define WM_CAP_SET_VIDEOFORMAT (WM_CAP_START + 45)
36#define WM_CAP_SET_PREVIEW (WM_CAP_START + 50)
37#define WM_CAP_SET_OVERLAY (WM_CAP_START + 51)
38#define WM_CAP_SEQUENCE_NOFILE (WM_CAP_START + 63)
39#define WM_CAP_SET_SEQUENCE_SETUP (WM_CAP_START + 64)
40#define WM_CAP_GET_SEQUENCE_SETUP (WM_CAP_START + 65)
41
42#define HWND_MESSAGE ((HWND)-3)
43
44#define BI_RGB 0
45
46typedef struct videohdr_tag {
47 LPBYTE lpData;
48 DWORD dwBufferLength;
49 DWORD dwBytesUsed;
50 DWORD dwTimeCaptured;
51 DWORD dwUser;
52 DWORD dwFlags;
53 DWORD_PTR dwReserved[4];
54} VIDEOHDR, NEAR *PVIDEOHDR, FAR * LPVIDEOHDR;
55
56typedef struct {
57 DWORD dwRequestMicroSecPerFrame;
58 BOOL fMakeUserHitOKToCapture;
59 UINT wPercentDropForError;
60 BOOL fYield;
61 DWORD dwIndexSize;
62 UINT wChunkGranularity;
63 BOOL fUsingDOSMemory;
64 UINT wNumVideoRequested;
65 BOOL fCaptureAudio;
66 UINT wNumAudioRequested;
67 UINT vKeyAbort;
68 BOOL fAbortLeftMouse;
69 BOOL fAbortRightMouse;
70 BOOL fLimitEnabled;
71 UINT wTimeLimit;
72 BOOL fMCIControl;
73 BOOL fStepMCIDevice;
74 DWORD dwMCIStartTime;
75 DWORD dwMCIStopTime;
76 BOOL fStepCaptureAt2x;
77 UINT wStepCaptureAverageFrames;
78 DWORD dwAudioBufferSize;
79 BOOL fDisableWriteCache;
80 UINT AVStreamMaster;
81} CAPTUREPARMS;
82/* End of missing MinGW defines */
83
84struct vfw_ctx {
85 HWND hwnd;
86 HANDLE mutex;
87 HANDLE event;
88 AVPacketList *pktl;
89 AVFormatContext *s;
90 unsigned int curbufsize;
91 unsigned int frame_num;
92};
93
94static enum PixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
95{
96 switch(biCompression) {
97 case MKTAG('Y', 'U', 'Y', '2'):
98 return PIX_FMT_YUYV422;
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99 case MKTAG('I', '4', '2', '0'):
100 return PIX_FMT_YUV420P;
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101 case BI_RGB:
102 switch(biBitCount) { /* 1-8 are untested */
103 case 1:
104 return PIX_FMT_MONOWHITE;
105 case 4:
106 return PIX_FMT_RGB4;
107 case 8:
108 return PIX_FMT_RGB8;
109 case 16:
110 return PIX_FMT_RGB555;
111 case 24:
112 return PIX_FMT_BGR24;
113 case 32:
114 return PIX_FMT_RGB32;
115 }
116 }
117 return -1;
118}
119
120#define dstruct(pctx, sname, var, type) \
121 av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var)
122
123static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms)
124{
125 av_log(s, AV_LOG_DEBUG, "CAPTUREPARMS\n");
126 dstruct(s, cparms, dwRequestMicroSecPerFrame, "lu");
127 dstruct(s, cparms, fMakeUserHitOKToCapture, "d");
128 dstruct(s, cparms, wPercentDropForError, "u");
129 dstruct(s, cparms, fYield, "d");
130 dstruct(s, cparms, dwIndexSize, "lu");
131 dstruct(s, cparms, wChunkGranularity, "u");
132 dstruct(s, cparms, fUsingDOSMemory, "d");
133 dstruct(s, cparms, wNumVideoRequested, "u");
134 dstruct(s, cparms, fCaptureAudio, "d");
135 dstruct(s, cparms, wNumAudioRequested, "u");
136 dstruct(s, cparms, vKeyAbort, "u");
137 dstruct(s, cparms, fAbortLeftMouse, "d");
138 dstruct(s, cparms, fAbortRightMouse, "d");
139 dstruct(s, cparms, fLimitEnabled, "d");
140 dstruct(s, cparms, wTimeLimit, "u");
141 dstruct(s, cparms, fMCIControl, "d");
142 dstruct(s, cparms, fStepMCIDevice, "d");
143 dstruct(s, cparms, dwMCIStartTime, "lu");
144 dstruct(s, cparms, dwMCIStopTime, "lu");
145 dstruct(s, cparms, fStepCaptureAt2x, "d");
146 dstruct(s, cparms, wStepCaptureAverageFrames, "u");
147 dstruct(s, cparms, dwAudioBufferSize, "lu");
148 dstruct(s, cparms, fDisableWriteCache, "d");
149 dstruct(s, cparms, AVStreamMaster, "u");
150}
151
152static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr)
153{
154#ifdef DEBUG_VFW
155 av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n");
156 dstruct(s, vhdr, lpData, "p");
157 dstruct(s, vhdr, dwBufferLength, "lu");
158 dstruct(s, vhdr, dwBytesUsed, "lu");
159 dstruct(s, vhdr, dwTimeCaptured, "lu");
160 dstruct(s, vhdr, dwUser, "lu");
161 dstruct(s, vhdr, dwFlags, "lu");
162 dstruct(s, vhdr, dwReserved[0], "lu");
163 dstruct(s, vhdr, dwReserved[1], "lu");
164 dstruct(s, vhdr, dwReserved[2], "lu");
165 dstruct(s, vhdr, dwReserved[3], "lu");
166#endif
167}
168
169static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih)
170{
171 av_log(s, AV_LOG_DEBUG, "BITMAPINFOHEADER\n");
172 dstruct(s, bih, biSize, "lu");
173 dstruct(s, bih, biWidth, "ld");
174 dstruct(s, bih, biHeight, "ld");
175 dstruct(s, bih, biPlanes, "d");
176 dstruct(s, bih, biBitCount, "d");
177 dstruct(s, bih, biCompression, "lu");
178 av_log(s, AV_LOG_DEBUG, " biCompression:\t\"%.4s\"\n",
179 (char*) &bih->biCompression);
180 dstruct(s, bih, biSizeImage, "lu");
181 dstruct(s, bih, biXPelsPerMeter, "lu");
182 dstruct(s, bih, biYPelsPerMeter, "lu");
183 dstruct(s, bih, biClrUsed, "lu");
184 dstruct(s, bih, biClrImportant, "lu");
185}
186
187static int shall_we_drop(struct vfw_ctx *ctx)
188{
189 AVFormatContext *s = ctx->s;
190 const uint8_t dropscore[] = {62, 75, 87, 100};
191 const int ndropscores = sizeof(dropscore)/sizeof(dropscore[0]);
192 unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer;
193
d76c3e07 194 if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) {
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195 av_log(ctx->s, AV_LOG_ERROR,
196 "real-time buffer %d%% full! frame dropped!\n", buffer_fullness);
197 return 1;
198 }
199
200 return 0;
201}
202
203static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr)
204{
205 struct vfw_ctx *ctx;
206 AVPacketList **ppktl, *pktl_next;
207
208 ctx = (struct vfw_ctx *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
209
210 dump_videohdr(ctx->s, vdhdr);
211
212 if(shall_we_drop(ctx))
213 return FALSE;
214
215 WaitForSingleObject(ctx->mutex, INFINITE);
216
217 pktl_next = av_mallocz(sizeof(AVPacketList));
218 if(!pktl_next)
219 goto fail;
220
221 if(av_new_packet(&pktl_next->pkt, vdhdr->dwBytesUsed) < 0) {
222 av_free(pktl_next);
223 goto fail;
224 }
225
226 pktl_next->pkt.pts = vdhdr->dwTimeCaptured;
227 memcpy(pktl_next->pkt.data, vdhdr->lpData, vdhdr->dwBytesUsed);
228
229 for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
230 *ppktl = pktl_next;
231
232 ctx->curbufsize += vdhdr->dwBytesUsed;
233
234 SetEvent(ctx->event);
235 ReleaseMutex(ctx->mutex);
236
237 return TRUE;
238fail:
239 ReleaseMutex(ctx->mutex);
240 return FALSE;
241}
242
243static int vfw_read_close(AVFormatContext *s);
244
245static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
246{
247 struct vfw_ctx *ctx = s->priv_data;
248 AVCodecContext *codec;
249 AVStream *st;
250 int devnum;
251 int bisize;
252 BITMAPINFO *bi;
253 CAPTUREPARMS cparms;
254 DWORD biCompression;
255 WORD biBitCount;
256 int width;
257 int height;
258 int ret;
259
260 if(!ap->time_base.den) {
261 av_log(s, AV_LOG_ERROR, "A time base must be specified.\n");
262 return AVERROR_IO;
263 }
264
265 ctx->s = s;
266
267 ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0);
268 if(!ctx->hwnd) {
269 av_log(s, AV_LOG_ERROR, "Could not create capture window.\n");
270 return AVERROR_IO;
271 }
272
273 /* If atoi fails, devnum==0 and the default device is used */
274 devnum = atoi(s->filename);
275
276 ret = SendMessage(ctx->hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0);
277 if(!ret) {
278 av_log(s, AV_LOG_ERROR, "Could not connect to device.\n");
279 DestroyWindow(ctx->hwnd);
280 return AVERROR(ENODEV);
281 }
282
283 SendMessage(ctx->hwnd, WM_CAP_SET_OVERLAY, 0, 0);
284 SendMessage(ctx->hwnd, WM_CAP_SET_PREVIEW, 0, 0);
285
286 ret = SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0,
287 (LPARAM) videostream_cb);
288 if(!ret) {
289 av_log(s, AV_LOG_ERROR, "Could not set video stream callback.\n");
76c2662b 290 goto fail_io;
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291 }
292
293 SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) ctx);
294
295 st = av_new_stream(s, 0);
296 if(!st) {
297 vfw_read_close(s);
298 return AVERROR_NOMEM;
299 }
300
301 /* Set video format */
302 bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0);
e4d286f1 303 if(!bisize)
76c2662b 304 goto fail_io;
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305 bi = av_malloc(bisize);
306 if(!bi) {
307 vfw_read_close(s);
308 return AVERROR_NOMEM;
309 }
310 ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi);
e4d286f1 311 if(!ret)
e110f486 312 goto fail_bi;
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313
314 dump_bih(s, &bi->bmiHeader);
315
316 width = ap->width ? ap->width : bi->bmiHeader.biWidth ;
317 height = ap->height ? ap->height : bi->bmiHeader.biHeight;
318 bi->bmiHeader.biWidth = width ;
319 bi->bmiHeader.biHeight = height;
320
321 ret = SendMessage(ctx->hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi);
322 if(!ret) {
323 av_log(s, AV_LOG_ERROR, "Could not set Video Format.\n");
e110f486 324 goto fail_bi;
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325 }
326
327 biCompression = bi->bmiHeader.biCompression;
328 biBitCount = bi->bmiHeader.biBitCount;
329
330 av_free(bi);
331
332 /* Set sequence setup */
333 ret = SendMessage(ctx->hwnd, WM_CAP_GET_SEQUENCE_SETUP, sizeof(cparms),
334 (LPARAM) &cparms);
e4d286f1 335 if(!ret)
76c2662b 336 goto fail_io;
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337
338 dump_captureparms(s, &cparms);
339
340 cparms.fYield = 1; // Spawn a background thread
341 cparms.dwRequestMicroSecPerFrame =
342 (ap->time_base.num*1000000) / ap->time_base.den;
343 cparms.fAbortLeftMouse = 0;
344 cparms.fAbortRightMouse = 0;
345 cparms.fCaptureAudio = 0;
346 cparms.vKeyAbort = 0;
347
348 ret = SendMessage(ctx->hwnd, WM_CAP_SET_SEQUENCE_SETUP, sizeof(cparms),
349 (LPARAM) &cparms);
e4d286f1 350 if(!ret)
76c2662b 351 goto fail_io;
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352
353 codec = st->codec;
354 codec->time_base = ap->time_base;
355 codec->codec_type = CODEC_TYPE_VIDEO;
356 codec->width = width;
357 codec->height = height;
358 codec->codec_id = CODEC_ID_RAWVIDEO;
359 codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount);
360 if(biCompression == BI_RGB)
361 codec->bits_per_sample = biBitCount;
362
363 av_set_pts_info(st, 32, 1, 1000);
364
365 if(codec->pix_fmt == -1) {
366 av_log(s, AV_LOG_ERROR, "Unknown compression type."
367 "Please report verbose (-v 99) debug information.\n");
368 vfw_read_close(s);
369 return AVERROR_PATCHWELCOME;
370 }
371
372 ctx->mutex = CreateMutex(NULL, 0, NULL);
373 if(!ctx->mutex) {
374 av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" );
76c2662b 375 goto fail_io;
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376 }
377 ctx->event = CreateEvent(NULL, 1, 0, NULL);
378 if(!ctx->event) {
379 av_log(s, AV_LOG_ERROR, "Could not create Event.\n" );
76c2662b 380 goto fail_io;
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381 }
382
383 ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0);
384 if(!ret) {
385 av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" );
76c2662b 386 goto fail_io;
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387 }
388
389 return 0;
76c2662b 390
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391fail_bi:
392 av_free(bi);
393
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394fail_io:
395 vfw_read_close(s);
396 return AVERROR_IO;
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397}
398
399static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
400{
401 struct vfw_ctx *ctx = s->priv_data;
402 AVPacketList *pktl = NULL;
403
404 while(!pktl) {
405 WaitForSingleObject(ctx->mutex, INFINITE);
406 pktl = ctx->pktl;
407 if(ctx->pktl) {
408 *pkt = ctx->pktl->pkt;
409 ctx->pktl = ctx->pktl->next;
410 av_free(pktl);
411 }
412 ResetEvent(ctx->event);
413 ReleaseMutex(ctx->mutex);
414 if(!pktl) {
415 if(s->flags & AVFMT_FLAG_NONBLOCK) {
416 return AVERROR(EAGAIN);
417 } else {
418 WaitForSingleObject(ctx->event, INFINITE);
419 }
420 }
421 }
422
423 ctx->curbufsize -= pkt->size;
424
425 return pkt->size;
426}
427
428static int vfw_read_close(AVFormatContext *s)
429{
430 struct vfw_ctx *ctx = s->priv_data;
431
432 if(ctx->hwnd) {
433 SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
434 SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0);
435 DestroyWindow(ctx->hwnd);
436 }
437 if(ctx->mutex)
438 CloseHandle(ctx->mutex);
439 if(ctx->event)
440 CloseHandle(ctx->event);
441
442 return 0;
443}
444
445AVInputFormat vfwcap_demuxer = {
446 "vfwcap",
447 "VFW video capture",
448 sizeof(struct vfw_ctx),
449 NULL,
450 vfw_read_header,
451 vfw_read_packet,
452 vfw_read_close,
453 .flags = AVFMT_NOFILE,
454};